Reunifying divided African country's capital (4)
I believe the answer is:
lima
'capital' is the definition.
(capital of Peru)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for lima that I've seen before include "Mail to Peru'd capital" , "Mail to Peru's capital" , "South American capital" , "Edible bean; capital city" , "Mail to capital of Peru" .)